
<table style="text-align:center"><caption><strong>Table C2. Regressing self-reported hostility on SDRT and demographic covariates</strong></caption>
<tr><td colspan="7" style="border-bottom: 1px solid black"></td></tr><tr><td style="text-align:left"></td><td colspan="6"><em>Dependent variable:</em></td></tr>
<tr><td></td><td colspan="6" style="border-bottom: 1px solid black"></td></tr>
<tr><td style="text-align:left"></td><td>Online</td><td>Offline</td><td>Online</td><td>Offline</td><td>Online</td><td>Offline</td></tr>
<tr><td style="text-align:left"></td><td colspan="2">S1. United States</td><td colspan="2">S2. Denmark</td><td colspan="2">S4. United States</td></tr>
<tr><td style="text-align:left"></td><td>(1)</td><td>(2)</td><td>(3)</td><td>(4)</td><td>(5)</td><td>(6)</td></tr>
<tr><td colspan="7" style="border-bottom: 1px solid black"></td></tr><tr><td style="text-align:left">SDRT</td><td>0.29 (0.02)<sup>***</sup></td><td>0.29 (0.02)<sup>***</sup></td><td>0.42 (0.03)<sup>***</sup></td><td>0.45 (0.03)<sup>***</sup></td><td>0.51 (0.04)<sup>***</sup></td><td>0.52 (0.04)<sup>***</sup></td></tr>
<tr><td style="text-align:left">Female</td><td>-0.02 (0.01)<sup>**</sup></td><td>-0.03 (0.01)<sup>***</sup></td><td>0.004 (0.01)</td><td>-0.002 (0.01)</td><td>-0.02 (0.01)</td><td>-0.01 (0.01)</td></tr>
<tr><td style="text-align:left">Age</td><td>-0.07 (0.01)<sup>***</sup></td><td>-0.07 (0.01)<sup>***</sup></td><td>-0.04 (0.02)<sup>**</sup></td><td>-0.03 (0.02)<sup>*</sup></td><td>-0.001 (0.0005)</td><td>-0.0004 (0.0005)</td></tr>
<tr><td style="text-align:left">White</td><td>-0.03 (0.01)<sup>***</sup></td><td>-0.02 (0.01)<sup>**</sup></td><td></td><td></td><td>-0.003 (0.02)</td><td>-0.02 (0.02)</td></tr>
<tr><td style="text-align:left">Higher educated</td><td>0.005 (0.01)</td><td>0.01 (0.01)</td><td>-0.01 (0.01)</td><td>-0.02 (0.01)<sup>*</sup></td><td>-0.03 (0.02)<sup>**</sup></td><td>-0.03 (0.02)<sup>*</sup></td></tr>
<tr><td style="text-align:left">Income</td><td>-0.02 (0.02)</td><td>0.0003 (0.02)</td><td>-0.02 (0.02)</td><td>-0.02 (0.02)</td><td>0.06 (0.03)<sup>*</sup></td><td>0.05 (0.03)<sup>*</sup></td></tr>
<tr><td style="text-align:left">US - Party ID</td><td>0.003 (0.01)</td><td>0.01 (0.01)</td><td></td><td></td><td>-0.03 (0.02)</td><td>-0.03 (0.02)<sup>*</sup></td></tr>
<tr><td style="text-align:left">DK - Party ID:Other</td><td></td><td></td><td>0.04 (0.02)<sup>***</sup></td><td>0.02 (0.02)</td><td></td><td></td></tr>
<tr><td style="text-align:left">DK - Party ID:Red block</td><td></td><td></td><td>0.01 (0.01)</td><td>0.003 (0.01)</td><td></td><td></td></tr>
<tr><td style="text-align:left">Constant</td><td>0.07 (0.02)<sup>***</sup></td><td>0.06 (0.02)<sup>***</sup></td><td>-0.02 (0.02)</td><td>-0.01 (0.02)</td><td>0.07 (0.03)<sup>**</sup></td><td>0.07 (0.03)<sup>**</sup></td></tr>
<tr><td colspan="7" style="border-bottom: 1px solid black"></td></tr><tr><td style="text-align:left">Observations</td><td>1,315</td><td>1,315</td><td>840</td><td>833</td><td>683</td><td>683</td></tr>
<tr><td style="text-align:left">Adjusted R<sup>2</sup></td><td>0.19</td><td>0.18</td><td>0.31</td><td>0.31</td><td>0.28</td><td>0.28</td></tr>
<tr><td colspan="7" style="border-bottom: 1px solid black"></td></tr><tr><td style="text-align:left"><em>Note:</em></td><td colspan="6" style="text-align:right"><sup>*</sup>p<0.1; <sup>**</sup>p<0.05; <sup>***</sup>p<0.01</td></tr>
</table>
